The Utilization of the Calcium of Carrots by Adults

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Abstract
The extent to which the calcium of carrots could be utilized by adults was determined for four women and three men. Following the procedure previously used in this laboratory, two levels of calcium were fed, one averaging 270 mg. daily, the other 449. The same basal dietary was fed throughout the experiment, the higher level having been brought about by the daily ingestion of 700 gm. carrots, the total calcium content of which averaged 202 mg. The basal period lasted for 34 days and the carrot period for 39 days. On the basis of differences between the intakes of these two periods and differences in the magnitude of the negative balances, the amount of carrot calcium utilized was computed; the values obtained were 17.6, 8.9, 12.9, 0.0, 33.5, 9.2 and 11.4%, averaging 13.4. Five of these seven subjects showed poorer utilization of the carrot calcium than they did of milk calcium in a previous study.